Throwing machine



. A g 8, 931- R. J. BARTHOLOMEW 1,819,634

THROWING MACHINE Filed Oct. '9. 1929 INVENITOR. I

ATTORNEYS.

Patented Aug. 18, 1931 UNITEDFSTATES PATENT OFFICE.

ROBERT J. BAn'rHoLoMnw, or GERMANTOWN, PENNSYLV NI .ASSIGNOR 'ro. FLETCHER. wonxs, INCORPORATED, or PHILADELPHIA, PENNSYLVANIA, A core .PORATION OF PENNSYLVANIA 'THRQWING MAoHINE Application filed October 9, 1929. Serial No; 398,331.

This invention relates to an improvement in throwing machines and is particularly directed to the stop motion mechanism of such machines.

In throwing machines as usually constructed faller wires are employed, these wires being provided with guide eyes for the thread being handled and so constructed that when the thread breaks the faller wire corresponding to the broken thread will fall by gravity about its pivot and set stop motion mechanism into operation to stop the machine.

These faller wires are so arranged, so far as their mounting is concerned and their position with respect to the thread being handled, as to be maintained almost at dead center when the machine is run so that the tension on the threads being handled will be reduced to a minimum. Due to the fact that the faller wires are maintained at substantially dead center when the machine is wires will fall toward the stop motion mechanism rather than in the opposite direction.

It will be understood that this mechanism is very light in construction so 'as to function properly but by the same token the mechanism is easily rendered inoperative. In present practice the faller wires as well as the stops therefor are constructed of iron or steel and I have found that these members apparently become magnetized, perhaps due to certain operations performed during their manufacture, with the result that due to magnetic attraction between the faller wires and the stops the faller wire fails to drop upon rupture of a thread being handled thereby with the result of course that the stop motion does not operate.

It is an object of the present invention to provide in throwing machines a construction so far as the faller wires and stops therefor are concerned whereby this detrimental characteristic is overcome in a simple, effective and inexpensive manner.

In the drawings accompanying this application:

Fig. 1 shows a faller wire and stop of a throwing machine in elevation together with a diagrammatic showing of the stop motion mechanism; and

Fig. 2 is a view similar to Fig.1 in plan. Referring to the drawings in detail, 1 designates a bracket supporting stop motion mechanism which is designated 2; this sto motion mechanism is well known and hence will not be described in detail herein.

Pivoted on an upstanding portionof the braclret 1 is a faller wire 3 pivoted at 4 and provided with a faller foot or stop motion foot 5, this foot, as is customary, being so disposedas to engage .a member 2 constitutinga part of the stop motion mechanism 2 whereby the stop motion mechanism will be set into operation. A

At the upper end of the faller wire 3 is an eye 6 which, asis usual, is made of porcelain or some similar material. 7 designates a stop,which for purposes of-illustration is shown as a stop wire, this stop lying. behind the faller wire and extending parallelto the axis of movement'of the faller wire.

Above the faller wire and the eye 6 thereof are spools designated 8 and 9 from which the threads 10-and 11 are taken.

In practice it will be understood that there are a plurality of faller wires 3 as shown in Fig. 2, and that each wire is provided with a guide eye 6.

The pivot 4 of the faller wire is so positioned with respect to the thread being wound, and the faller wire itself together with the eye 6 are so shaped that when the machine is in operation the faller wire will be maintained practically at dead center. Thisis for the purpose of reducing as far as possible the tension on the thread 10, for example, which maintains the faller wire in operative position, the faller wire, as above explained, upon the breaking of the thread passing through the eye thereof, falling to the right as viewed in Fig. lto bring, the faller foot into operative position with respect to stop motion mechanism 2.

Due to the fact that very little tension can be imposed on the threads being handled in the machine, it is to be appreciatedthat the faller wire construction is extremely light and must be so arranged as to operate easily inasmuch as otherwise upon the breaking ot a thread the taller wire will tail to move about its pivot t to set the stop motion into operation. The stop 7 is provided for the purpose ot' preventing the taller wire moving to the lett as viewed in Fig. 1 away from the stop motion mechanism instead 0t in the opposite direction. 7

As above pointed out the stop 7 and taller wires 3 are made of iron or steel, as standard practice, and possibly due to operations performed in the course of their manufacture, or tor other reasons, become magnetized so that there is a magnetic attraction between the taller wires and the stop which prevents the taller wires from tunctioning so tar as pivoting to set the stop motion into operation is concerned. To overcome this inherent characteristic I propose to make either the taller wire or the stop members, or both, of materials which are not magnetizable. These materials might include glass, wood, compositions of various kinds and most non-ferrous metals except nickel or cobalt. Good results can be obtained by covering either the taller wires or the stops with materials such as rubber, porcelain tubing,'etc. and where in the appended claims the statement is made that the taller wire or the stopmember, or both, is constructed of nonmagnetizable material this-expression is intended to cover not only the making ot the taller wires or the stop members, orboth, of materials such as glass, wood, etc. but to cover also a construction wherein these members are covered with soft rubber or porcelaintubing, etc. as above mentioned.

WVhat I claim is 7 '1. In throwing machines, a taller wire, a stop therefor ot non-magn'etizable material intermediate the ends ot said wire and in contact therewithduring the operation of the machine.

2. In throwing machines,- a taller wire, a stop therefor intermediate the ends thereot, said taller wire being constructed 0t nonmagnetizable material. i

3. In throwing machines, a taller wire, a stop tor engaging said wire intermediate the ends thereof during the operation of the machine, said taller wire and stop being constructed ot non-magnetizable material. I p

4. 111 throwing machines, a taller wire, a stop wire cooperating therewith to hold said taller wire in operative position, said stop wire being constructed of non-magnetizable material.

5. In throwing machines, the combination of a taller wire a stop wire, cooperating therewith to hold the taller wire-in operative position, said taller wire being constructed ot non-magnetizable material.

6. In throwing machines, the combination of a stop wire, a taller wire adapted to be engaged by said stop wire intermediate its ends, said stop wire and taller wire being constructed of non-magnetizable material.

7. In throwing machines, the combination of a stop wire, a plurality of taller wires cooperating with said stop wire whereby the taller wires areheld in operative position, the material of said stop and taller wires being such as to eliminate detrimental magnetic attraction between the taller wires and the stop wire.

This specification signed this 5th day of Oct., 1929.

ROBERT J. BARTHOLOMEIV. 

